1.3 Problem Statement
In last few years, there has been a rapid increase in the use of wireless devices in applications such as mobile phones and sensor networks. These
devices are powered by a portable device, and limited energy of battery. This means an increase in the use of the application will result in the battery being
used has also increased and these batteries need to be replaced often. These batteries contain heavy metals, which if we are not properly disposed of it can
leak it contains into the environment pollution increases. Consequently, the use of green technologies such as RF power system is one of the solutions to
overcome this problem for developing wireless broadcasting and communications systems generated the free energy.
The main problem in the RF energy scavenging system is the amount of energy captured from the around the RF source is very low. This effect may
be due to low levels of RF power levels and antenna mismatch to the rectifier. To capture the maximum power, the receiving antenna should be well
designed, taking into consideration the many factors to achieve impedance matching between antenna and rectifier at the operating frequency and to
obtain maximum power transfer and minimize transmission loss from the effects of PCBs. Hence, to convert more of the antenna surface incident RF
power to DC power, high efficiency RF to DC conversion required by correcting circuit.
1.4 Scope of Work
The main objective of this project is to design a narrow band antenna using circuit rectify for energy scavenging system. The first step in the design
process is to find and collect information about the project such as the journals and papers on the internet. This project will focus on the design and analysis,
testing and measurement of microstrip patch antenna captures electromagnetic energy from the RF signal being transmitted by the communication system in
the frequency range of the WLAN band 2.45 GHz. Computer Simulation Technology or CST Studio Suite will be used for the antenna design process.
The type of antenna will be designed that is a rectangular patch antenna array. After the complete design process, the next procedure is to fabricate circuits
and do testing and measurement procedures. Then, the results will be compared to the measurement results and the actual results. Other antenna parameters
such as return loss level, gain, and radiation pattern also will be look of antenna design.
1.5 Methodology
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